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samarasa
samarasa

Reputation: 2125

How to force models to take all the input variables in WEKA?

I am using REPTree model in WEKA. My data has three input variables. Even setting up unpruned as TRUE, REPTree is only taking two input variables. How to force the model to take all the input variables? Please help me.

Upvotes: 0

Views: 144

Answers (1)

Lars Kotthoff
Lars Kotthoff

Reputation: 109262

Algorithms that learn a decision tree will in general take only a subset of the features. This is because some features do not really carry any information with respect to the classes that you want to distinguish. That is, if for example the feature values are the same for all the examples, then there is no point in including it in a classifier as it does not add any information.

The algorithms that induce decision trees (including REPTree) are designed to pick only the most informative features. Unless you absolutely know what you're doing and have a specific reason for wanting to include all features, you should trust what the algorithm is doing.

Upvotes: 1

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